From

North Korea

Geoffrey Cain, the GlobalPost's correspondent in Seoul, South Korea, discusses the deteriorating situation on the peninsula, as tensions continue to rise with North Korea.

Japan will consider its own sanctions against North Korea which has appeared to have conducted a nuclear test, Japanese Prime Minister Shinzo Abe said on Tuesday.

"I have ordered that we consider every possible way to address this issue, including our own sanctions, while cooperating with other countries," Abe told reporters after a meeting of Japan's security council.

North Korea likely conducted a nuclear test on Tuesday, said South Korea's defence ministry, after seismic activity measuring 4.9 magnitude was registered by the U.S. Geological Survey.

LAUSANNE, Switzerland - The United States said on Tuesday that world powers and Iran would keep negotiating over an outline accord on curbing Tehran's nuclear program beyond a midnight deadline, even though tough questions remain. | Video